Trolley-head.



A. SHAVER. I

i TROLLEY HEAD. APPLIOATION FILED JUNE 29, 1910.

986;027, I Patented Mar.7, 1911.

ALFRED SHAVER, OE HUNTSVILLE, ALABAMA.

TROLLEY-HEAD.

Specification of Letters Patent. 7

Application filed June 29, 1910. Serial No. 569,599.

Patented Mar. *7, 1911.

To all whom it may concern:

Be it known that I, ALFRED SHAVER, a citizen of the United States, residing at Huntsville, in the county of Madison and State of Alabama, have invented certain new and useful Improvements in Trolley-Heads; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being. had to the accompanying drawings, and to the letters and figures of reference markedthereon, which form a part of this specification.

This invention relates to new and useful improvements in trolleys for overhead systems and consists in the provision of various details of construction and combinations and arrangements of parts which will be hereinafter fully described and then specifically defined in the appended claims.

' I illustrate my invention in the accompanying drawings, in which Figure 1 is a vertical sectional view through a trolley head and jacket. Fig. 2 is a detailed perspective of the end of the jacket. Fig. 3 is a detail perspective view of the trolley head, and Fig. 4 is a sectional view through the trolley head and wheel mounted therein.

Reference now being had to the details of the drawings by letter, A designates a pole jacket and B a pole connected thereto. The upper portion of said jacket has integral therewith the trolley arm D having an aperture D formed therein for the reception of the shoulder bolt D? E designates a swivel head having two wings E which are apertured at their upper ends to receive the pin F upon which the grooved trolley wheel H is mounted. Said arm D has a recess formed about the aperture therein, and I designates a cont-act spring washer which is seated in said recess and about the enlarged portion of the belt D and serves to make perfect contact between the car and the wire. A nut d is mounted upon the bolt D and allows said head to have a swivel movement. An integral boss N projects from the bottom of the head, and an integral pin N pro-' jects from said boss N and is adapted to bear against the coiled spring I', serving to hold the latter in place and also to center the trolley head, one end of the coiled spring adjacent to the end of the projection of the trolley jacket being adapted to bear yieldingly against the boss N of the head. One end of the bottom of the trolley head is recessed away as at O and, when the trolley head is adjusted in place upon the jacket, the lug J is positioned in saidrecess and serves as a stop to limit the swinging movement of the trolley head by the side walls of the latter coming in contact with said lug. Suitable leaf springs M are fastened at their lower ends to the wings of the swivel head and their upper ends, which are apertured and fit over the pin F, bear yieldingly against the opposite faces of the trolley wheel to insure suflicient contact therewith.

By the provision of an improved trolley apparatus as shown and described, I have found that the wheel will never arc with .the wire as the swivel head will hold the wheel at all times parallel with the wire and, owing to the swivel connection shown and described, the head will have a more perfect cont-act with the wire, a large amount of surface of the wire being allowed to bear on the wheel than with ordinary forms commonly in use. As the head and wheel turn they will parallel the wire about the curves, less frictional contact comes upon the wheel and, owing to the greater bearing surface between the wire and surface of the groove of the wheel and the,

contact surface between the springs and head, a steadier and greater power is conveyed to the car than would otherwise be the case in the event of the wheel being held from turning upon a swivel head. As the wheel is at all times allowed to parallel the wire, any jumping of the wire is prevented.

What I claim to be new is l. A trolley comprising a pole jacket having a boss projecting from the upper sur-' face thereof, a lug upon said boss, said jacket having a lateral projection with an aperture therein about which is formed a recess, a trolley head, a swivel bolt passing through the aperture in said lateral projection of the jacket pole and through an aperture in the bottom of said head, a spring seated in the recess about the aperture in said jacket and bearing against the head, the bottom of said head adapted to rest upon the boss'upon the pole jacket and having opposite walls projecting upon either side of said lug and cooperating with the latter to limit the iwinging movement of the head, as set ort 2. A trolley comprising a pole jacket having a lateral projection with an aperture therein about which is formed a recess and having a boss with a lug thereon, a trolley head, an apertured boss projecting from the bottom of the latter, a coiled spring seated in said recess, an integral pin projecting from the boss of said head and adapted to bear against said coiled spring, one end of the latter bearing yieldringly against the boss of the head, a swivel bolt passing through the lateral projection of the pole jacket and said head, the bottom of said head adapted to rest. upon the boss of said pole jacket and having a recessed end, the side walls of the head extending on either side of said lug and adapted to cooperate with the latter to limit the swinging movement of the head, as set forth.

3. A trolley comprising a pole jacket having a lateral projection with an aperture therein about which is formed a recess and having a boss with a lug thereon, a trolley head, an apertured boss projecting from the bottom of the latter, a coiled spring seated in said recess, an integral pin projecting from the boss of said head and adapted to.

bear against said coiled spring, one end of the latter bearing yieldingly against the boss of the head, a swivel bolt passing through the lateral projection of the pole jacket and said head, the bottom of said head adapted to rest upon the boss of said pole jacket and having a recess end, the side walls of the head extending on either side of said lug and adapted to cooperate with the latter to limit the swinging movement of the head, said pole jacket having a flange extending partially about the boss thereon and against which the ends of the side walls of the trolley head are adapted to bear, as set forth.

In testimony whereof I hereunto aifix my signature in the presence of two witnesses.

ALFRED SHAVER.

Witnesses CHAS. E. SHAVER, CHAS. H. FRENCH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

